Lamp-house for moving-picture machines



N. POWER. y LAMP HOUSE FOR MOVING PICTURE MACHINES.

APPLICATION FILED IUNE 6, 19I6 RENEWED DEC. 7. |920.'

Patented July 5', 1921.

NIIIIIIIII SETE@ NICHOLAS POWER, or BROOKLYN, NEW YoRHAssrsNon To NICHOLAS POWER COMPANY, OIE' NEW YORK, N. Y.,

A CORPORATION OFDELAWARE.

y LAMHHOUSE FOR MOVING-:Hernan MACHINES.

Application filed June 6, 1916, Serial No. 102,072.

To all whom it may Concern:

Be it known that l, NICHOLAS POWER, a citizen of the United States., and a resident of the borough of Brooklyn, city, county, and State of New York, have invented new and useful Improvements in Lamp-Houses for Moving-Picture Machines, of which the following is a specication.

This invention relates to lamp-houses 'for are lamps of the Character used for the projection of motion pictures, and has for its object to provide' a lamp house in which a highpowered are can be used with perfect safety and so designed that no part of the lamp' house lbecomes suiiiciently heated to burn the operator, or ignite the film incase of accidental contact therewith.

More particularly the invention lconsists of an improvement on the lamp house disclosed in my prior application No. 55,408 filed October 12, 1915, and embodies adesignand arrangement of parts whereby a more uniform circulation of air through the lamp house is secured, and. also means whereby the fro-nt and top walls particularly are protected from the intense heat of the lamp. These walls are the ones that receive most of the heat from the lamp, the arc being much nearer the front than the back. Moreover, these walls are more liable to come into accidental Contact with the film and itis essential that they be maintained at a lo-w temperature.

My invention also embodies an arrangement of condensers whereby the lamp may beused'as a spot-light `when not used for` the exhibition of pictures, and to this end the invention comprises an arrangement of condensers upon a movable wall of 'the lamp house so that the projecting condensers may be-swung out .of the way and a special spotlight condenser inserted in a moments time. In the accompanying drawings, vI have illustrated a preferred design of my improved lamp house, and in said drawings,

`Figure 1 -is a vertical section through the lamp house showing the arc lamp in dotted lines;

l A Fig. 2 is a vertical section of the lamp house alone at right angles to Fig. 1;

Fig. 3 is a sectional detaily view ofthe front of the lamp house; and 1 l Fig. 4 is a detail .viewl of the detachable condenser for use with the lamp as a spot- Specification of Letters Patent.

Patented July 5, 1921.

Renewed December 7, 1920. Serial No. 429,035.

`lamp houseis formedof twospaced sheets,

the front sheet 4 supporting the condensers 5 ,by which the light is centered on the film. The rear sheet 7 of the front wall is spaced slightly back .of the front` sheet to provide an air circulating channel extending the full height ofthe lamp house, The condensers 5 andthe funnelV 6 are carriedvby a hinged portion 8 of thefront wallA 4 as in d'lcated more particularly in Fig. 3, whereby the condensers may be swung entirely clear, of the front of the lamp housel The condensers comprise the usual pair of lenses, the rear lens being adjustably supported on` upper and lower rods 9 for movement to ward and fromV the front lens through the agency of an adjusting screw10 `mounted Vfor rotation inthe door 8 and threaded'into .an eye on the rearv lens-holder.

Therearlens-holder projects linto a central hole formed in a cast lens housing ,11 supported in the rear sheet 7 of the front wall, as shown in Fig. 1. i f

The upper part 12 of the lamp house is also formed with doublewalls and'asshown is preferably formed as a cap or roof tele` scoping on `the upper yedge of the side and end walls.` of the lamp house. The front sheet 4 Vof thefront wall and the rear and side walls of the lamp houseare beaded to provide a shoulder 13 supporting the lowerl edgeof the upperpart 12 and these walls terminate slightly above the shoulder 13, as indicated. Therearsheet 71 however-is continued above' the other walls and is turned` backward in a curved' tongue 14 which registers withthe middle partition 15 of the roof 12 to dividerthe space Vwithin the roof into two separate passages. The lower wall 16 of the upper part fits over the edges of the rear and sidewalls and extends v but part way across the top ofthe main portion Iof the lamp house to provide anopeningfor the escape of the-hot air in the lamp house. The middle wall 15 extends fromthe tongue 14 to the rear wall of the Vupper portion or hood 12 and is provided at the rear with a circular opening entering the short flue 17 which projects through the top wall 18, here shown vas of angular shape with a middle bridge lile'a gable roof. The space between the walls 15 and 18 communicates with the space between the front sheets t and 7 of the iront wall and also with the flue 17 through 'a hole 19 cut in the wall orP the flue whereby an entirely independent circulation oi:l air is maintained between the front walls of the lamp house and through the condensers, ete.

Air is admitted vto the space between the front walls through a bottom opening 2O and air is admitted to the main compartment of the lamp housethrough a bottom opening 21 and also throughthe side'openings V22 above and below the doors, the side openings being of substantially the saine construction as shown in my co-pending application above referred to. V

The doors 3 are also doublegwalled as shown in niy co-pending application, but as here shown" the outer sheet of the door Yis flat and the inner one recessed or oiiset to ,provide the space between the sheets formthe lamp to be trimmed withoutopening theV doors.

`To permit the lamp to be used as a spotlight'lv p'referably'provide a single condenser or lens, indicatedV at 25, supported inv ay hanger 26 shaped to Vtit the front tace of the casting .11 and having agrip-operated catch' 27 adapted to clamp over the edge 28 oit' the lower fixed part of4V ther'front wall i when the'door 8 supporting the projecting condensers, etc.,lis opened. To use the'lamp fortliis purpose, "the lamp house is shifted i on the tracks 2 beyond the projecting mech-r *anismv and the door'8 is swung open wide so that the spot-light lens may be clamped in place in the 'manner indicated in Fig.' 4.

For this purpose the lamp houselwill be" used'in conjunction with a supporting stand such. as shownv in my prior application No. 55,409, ii.ledv()ctober'12,i 1915, wherein `the lamp house 'carryingportion of the stand 'is swiveled to the base portion torV adjustment thereon, a clamp being provided Jfor locking theV parts 'in their adjusted positions. Touse thelampy` as a spotllight theclainp is loosened so that the operator may swing the lainphouse on its swivel joints to cause the light toY follow the movements of they actor on thestage. Y

ln operation the heat 'from the lamp causes a circulation of airthiough the main compartment of the lamp house and out through the flue 17. Thisheated air heats .the wall 15, producing an upward circulation through the front passage between .two walls of the lamp house. 'Also the.

from the' heat of the lamp and are heated Y only by the air through the passage-way, and ii the circulation is suiiiciently rapid the walls will not become heated to a temperaturc suilicient to ignite the ilm. As the only portions of the side walls close venough to the lamp to be heated4 are'the doors whose outer walls. are preventedfrom overheating by the independent circulation of air through the doors, there is no portion lof the lamp house which can become hot enough toV ignite the film in case of accidental contact oi' the iilni with the heated lamp house.

i desired the lowerniost horizontalV wall 16" may be omitted to permit the air from all parts oi?V the interior ot the Vlamp house to pass directly into the flue 17. The purpose otthis wall with the opening near the front? of the lamp house is to draw the air toward the front where the heat is greatest, but with the auxiliary passages between the front andtop walls of suiiicientsize the outside walls will be kept sufficiently 'cooled without using the inner wall 15.

liclaim:VV Y Y 1'. i lamp housefor proj eating lamps consisting of a box-like housing inclosing the lamp,one wall or" said housing consisting ot two spaced sheets forming `a passage for air circulation therebetween, said 'walls being formed with registering apertures for the passage of the light rays'from the housing, a pair of condensers supported'in'said` apertures, saidf condensers" being. spaced apart and with the vspace between' them communicating with the space between the two sheets of the wall, and 'airvingress and egress openings to said passage.

.2. A ljamp house for projecting lamps Y consisting of' a box-like housing inclosingthe lamp, one wall otsaid vhousing .consistingo two spaced sheets forming a passage for' air circulation therebetween, said walls .being `formed lwith registeringapertures'- torthe" passage of the light rays from the housing,

Va pair of condensers supported in saidaper-` tures, said condensers being' spaced lapart and with the space between them communieating with the space between the two sheets. Y

' of thewall, an air ingress openingleading from the outside air intov said passage and an egress opening from said passage directly to the'outside air, therebyvproviding for the'circula'tion of airthrough saidpassagey independently of the lamp-containing compartment ot the housing.

3. 'A lamphouse for projecting lamps consisting of a housing inclosing the lamp, one wall of said housing consisting of spaced sheets providing a passage lfor air'circulation therebetween, a movable support for the condenser lenses carried by'fthe outer one of said spaced sheets, said inner spaced sheet having'an opening in a portion adjacent said suppOrt, and condenser lenses mounted on said movable-supportand de'l` signed yto project into and substantially fill the openingl in said'innersheet, said passage having ingress and egress openings Jfor the circulating air.

4. A lamphouse for, projecting lamps consisting of a housing inclosing the lamp, one wall of said housing consisting of spaced sheets providing a passage for air circulation therebetween, said outer sheet comprising a hinged portion, said inner spaced sheet having an opening in a portion adjacent said hinged part, and condenser lenses mounted on said hinged part and designed to project into and substantially fill the opening in said inner sheet, said passage having ingress and egress openings for the circulating air.

5. A lamphouse for projecting lamps consisting of a box-like housing having one wall formed of spaced sheets, condenser lenses supported by said wall arranged to substantially close communication between Y the space between said sheets and the lampcontaining compartment, air ingress openings in said lamp house adjacent each face of the inner sheet'of said wall, and egress passages Jfor said lamp-containing compartment and said space arranged to maintain a circulation of air yalong each face of said inner wall to thereby protect the condensers 'against excessive heating.

6. A lamphouse for projecting lamps consisting of a box-like housing having one wall formed of spaced sheets, condenser lenses supported by said wall arranged to substantially close communication between the space between said sheets and the lamp.- containing compartment, air ingress openings in said lamphouse adjacent each face of the inner sheet of said wall, said lamphouse having atop portion provided with upper and lower air passages communicating respectively with said lamp-containing compartment and said air passage respectively.

7. A lamphouse for projecting lamps consisting of a box-like housing having double-walled doors on each iside occupying the major portion of the wall area adjacent thelamp, said housing having a double front wall,'condenser lenses supported thereby, airvingress passages adjacent the bottom of-said housing into said'lamp-containing* compartment andthe space between the two sheets of the Vdouble front wall, a topv 8. A lamphouse forprojectinglampsconc sisting ofa housing havingfa base portion, front .and rearA walls and side walls connected to said base portion, said front wall comprising spaced sheets providing a pasc sage for the circulating air separate vfrom the lamp-containing compartment, condensers supported in said passage, a top detachably mounted on saidv frontand rear wall, said top having Aa portion communicating with the lamp compartment, and a division plate forming a separate upper portion, said division plate adapted to register with the inner sheet of said double iront wall when the top is in place, said separate upper porv tion having an egress opening at the opposite end of said division c plate whereby the heat absorbed by saidV division plate will heat the air in said upper ortion and produce a circulating draft etween the two sheets of the front wall of the housing.

9. lamp house for projecting lamps which consists of a housing inclosing the lamp, said housing having a detachable upper portion formed of three spaced walls, j j

the bottom wall having an opening communicating with the lamp-containing compartment and the space between the lower wall and the middle wall yhavin opening into the outer air, w ereby the air heated in the lamp compartment is kept out of contact `with the top wall of the housing. V c

10. lamp house for projecting lamps an egress v which consists of a housing inclosing the v lamp, said housing having a detachable upper portion formed of three spaced walls, the bottom wall having an opening communicating with the lamp-containing compartment and the space between the lower v wall and the middle wall having an opening into a flue to the outside air, the space between the middle and top walls also having an opening 1n said flue, and a separate ingress passage for air into the space be-v tween the middle and top walls.Y

11. A lamp house for projecting lamps which consists of `a housing. inclosing the lamp,said housing having a detachable :upper portion formed of three spaced walls, the bottom wally having an opening communi'- eatingz with the'y lamp-containing compartment and the space between the lower wallv and thev middle wall haulingA an opening; into a flue to thev outside air, theY spaceV between the middleand top wallsA also having anopening inA said flue,l the front wall of sai-d housing being composedv ofwtwoy separate spaoedsheets with the space between them communicating with the lspace between the upper and- Iniddle walls of the top por-- tion and anv opening into said space at the bottom thereof; whereby a circulation of outside air is maintained*betweenA the front and top walls of the lamp house andthe lamp-containing compartment.

jacent said? hinged portion', ycondenser lenses supported on saidhinged portion-'adapted to project into and: subst'antially.vv fill said4 opening and anf auxiliary lens adaptedy to substantially fit' said opening in the inner wa1l,saidV lens havingy supporting means adapted -or detachable engagement withy the stationary portion of theouter sheet :ot said wall when said hinged portion is swung O en;

pSigned at New York city, in the county. of New York-and State of New York., this 119th day of May, 1916. t

NICHOLAS ron/TER. 

